E-Gold and Paypal are the two main options for E-Currency available. E-Gold is backed by actual gold reserves in a bank in Panama while Paypal is backed by actual currency. Paypal has established itself as the main company of choice for buying online. Getting a Paypal account is free however you would have to verify your identity with credit card.
A severe disadvantage of paypal is that they have been known to freeze questionable accounts. E-Gold on the other hand is free and anonymous and does not impose any restrictions on questionable accounts, it is backed by physical gold so no country based on it’s own currency can take action against the account. Currency can be deposited to E-Gold by using one of the many online currency exchange services.